I guess I forgot how to use iPhone after using Samsung Galaxy s3 for 3 months. It was just the lock buton to turn it off :) And realized after trying to restore, deleting contacts etc, I didn't miss the iPhone at all

Hi. I am having a problem with my iPhone. It is a 3gs. I am giving my iPhone to my father. So I restored it. It restarted and it is waiting for registration. My father is not here right now, so I don't have his sim card to insert. I already restored it and I just want to turn off the phone. It...